{"instruction": "You are an expert in event argument extraction. Please extract event arguments and their roles from the input that conform to the schema definition, which already includes event trigger words. If an argument does not exist, return NAN or an empty dictionary. Please respond in the format of a JSON string.", "schema": [{"event_type": "potential therapeutic event", "arguments": ["Treatment.Disorder", "Subject.Age", "Treatment", "Subject.Gender", "Treatment.Duration", "Combination.Drug", "Subject.Disorder", "Subject", "Treatment.Dosage", "Effect", "Treatment.Time_elapsed", "Treatment.Route", "Treatment.Freq", "Subject.Population"]}], "input": "In the second case, five cardiac arrests due to ventricular tachycardia and fibrillation occurred during several hours after beginning a trial of bretylium maintenance therapy for complex ventricular ectopy."}
{"potential therapeutic event": []}